com.codename1.charts.views

Class AbstractChart

java.lang.Object

com.codename1.charts.views.AbstractChart

Direct Known Subclasses:

RoundChart, XYChart

public abstract class AbstractChart
extends Object

An abstract class to be implemented by the chart rendering classes.

Constructor Summary

Constructors

Constructor and Description
AbstractChart()

Method Summary

Modifier and Type	Method and Description
abstract void	draw(Canvas canvas, int x, int y, int width, int height, Paint paint) The graphical representation of the chart.
protected void	drawBackground(DefaultRenderer renderer, Canvas canvas, int x, int y, int width, int height, Paint paint, boolean newColor, int color) Draws the chart background.
protected void	drawLabel(Canvas canvas, String labelText, DefaultRenderer renderer, List<Rectangle2D> prevLabelsBounds, int centerX, int centerY, float shortRadius, float longRadius, float currentAngle, float angle, int left, int right, int color, Paint paint, boolean line, boolean display) Draws a text label.
protected int	drawLegend(Canvas canvas, DefaultRenderer renderer, String[] titles, int left, int right, int y, int width, int height, int legendSize, Paint paint, boolean calculate) Draws the chart legend.
abstract void	drawLegendShape(Canvas canvas, SimpleSeriesRenderer renderer, float x, float y, int seriesIndex, Paint paint) The graphical representation of the legend shape.
protected void	drawPath(Canvas canvas, float[] points, Paint paint, boolean circular) The graphical representation of a path.
protected void	drawPath(Canvas canvas, List<Float> points, Paint paint, boolean circular) The graphical representation of a path.
protected void	drawString(Canvas canvas, String text, float x, float y, Paint paint) Draw a multiple lines string.
protected boolean	getExceed(float currentWidth, DefaultRenderer renderer, int right, int width) Calculates if the current width exceeds the total width.
protected String	getLabel(NumberFormat format, double label) Makes sure the fraction digit is not displayed, if not needed.
abstract int	getLegendShapeWidth(int seriesIndex) Returns the legend shape width.
protected int	getLegendSize(DefaultRenderer renderer, int defaultHeight, float extraHeight) Calculates the current legend size.
SeriesSelection	getSeriesAndPointForScreenCoordinate(Point screenPoint) Given screen coordinates, returns the series and point indexes of a chart element.
boolean	isNullValue(double value)
boolean	isVertical(DefaultRenderer renderer) Checks if the current chart is rendered as vertical.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractChart

public AbstractChart()

Method Detail

draw

public abstract void draw(Canvas canvas,
                          int x,
                          int y,
                          int width,
                          int height,
                          Paint paint)

The graphical representation of the chart.

Parameters:

canvas - the canvas to paint to

x - the top left x value of the view to draw to

y - the top left y value of the view to draw to

width - the width of the view to draw to

height - the height of the view to draw to

paint - the paint

drawBackground

protected void drawBackground(DefaultRenderer renderer,
                              Canvas canvas,
                              int x,
                              int y,
                              int width,
                              int height,
                              Paint paint,
                              boolean newColor,
                              int color)

Draws the chart background.

Parameters:

renderer - the chart renderer

canvas - the canvas to paint to

x - the top left x value of the view to draw to

y - the top left y value of the view to draw to

width - the width of the view to draw to

height - the height of the view to draw to

paint - the paint used for drawing

newColor - if a new color is to be used

color - the color to be used

drawLegend

protected int drawLegend(Canvas canvas,
                         DefaultRenderer renderer,
                         String[] titles,
                         int left,
                         int right,
                         int y,
                         int width,
                         int height,
                         int legendSize,
                         Paint paint,
                         boolean calculate)

Draws the chart legend.

Parameters:

canvas - the canvas to paint to

renderer - the series renderer

titles - the titles to go to the legend

left - the left X value of the area to draw to

right - the right X value of the area to draw to

y - the y value of the area to draw to

width - the width of the area to draw to

height - the height of the area to draw to

legendSize - the legend size

paint - the paint to be used for drawing

calculate - if only calculating the legend size

Returns:

the legend height

drawString

protected void drawString(Canvas canvas,
                          String text,
                          float x,
                          float y,
                          Paint paint)

Draw a multiple lines string.

Parameters:

canvas - the canvas to paint to

text - the text to be painted

x - the x value of the area to draw to

y - the y value of the area to draw to

paint - the paint to be used for drawing

getExceed

protected boolean getExceed(float currentWidth,
                            DefaultRenderer renderer,
                            int right,
                            int width)

Calculates if the current width exceeds the total width.

Parameters:

currentWidth - the current width

renderer - the renderer

right - the right side pixel value

width - the total width

Returns:

if the current width exceeds the total width

isVertical

public boolean isVertical(DefaultRenderer renderer)

Checks if the current chart is rendered as vertical.

Parameters:

renderer - the renderer

Returns:

if the chart is rendered as a vertical one

getLabel

protected String getLabel(NumberFormat format,
                          double label)

Makes sure the fraction digit is not displayed, if not needed.

Parameters:

format - the number format for the label

label - the input label value

Returns:

the label without the useless fraction digit

drawPath

protected void drawPath(Canvas canvas,
                        List<Float> points,
                        Paint paint,
                        boolean circular)

The graphical representation of a path.

Parameters:

canvas - the canvas to paint to

points - the points that are contained in the path to paint

paint - the paint to be used for painting

circular - if the path ends with the start point

drawPath

protected void drawPath(Canvas canvas,
                        float[] points,
                        Paint paint,
                        boolean circular)

The graphical representation of a path.

Parameters:

canvas - the canvas to paint to

points - the points that are contained in the path to paint

paint - the paint to be used for painting

circular - if the path ends with the start point

getLegendShapeWidth

public abstract int getLegendShapeWidth(int seriesIndex)

Returns the legend shape width.

Parameters:

seriesIndex - the series index

Returns:

the legend shape width

drawLegendShape

public abstract void drawLegendShape(Canvas canvas,
                                     SimpleSeriesRenderer renderer,
                                     float x,
                                     float y,
                                     int seriesIndex,
                                     Paint paint)

The graphical representation of the legend shape.

Parameters:

canvas - the canvas to paint to

renderer - the series renderer

x - the x value of the point the shape should be drawn at

y - the y value of the point the shape should be drawn at

seriesIndex - the series index

paint - the paint to be used for drawing

getLegendSize

protected int getLegendSize(DefaultRenderer renderer,
                            int defaultHeight,
                            float extraHeight)

Calculates the current legend size.

Parameters:

renderer - the renderer

defaultHeight - the default height

extraHeight - the added extra height

Returns:

the legend size

drawLabel

protected void drawLabel(Canvas canvas,
                         String labelText,
                         DefaultRenderer renderer,
                         List<Rectangle2D> prevLabelsBounds,
                         int centerX,
                         int centerY,
                         float shortRadius,
                         float longRadius,
                         float currentAngle,
                         float angle,
                         int left,
                         int right,
                         int color,
                         Paint paint,
                         boolean line,
                         boolean display)

Draws a text label.

Parameters:

canvas - the canvas

labelText - the label text

renderer - the renderer

prevLabelsBounds - the previous rendered label bounds

centerX - the round chart center on X axis

centerY - the round chart center on Y axis

shortRadius - the short radius for the round chart

longRadius - the long radius for the round chart

currentAngle - the current angle

angle - the label extra angle

left - the left side

right - the right side

color - the label color

paint - the paint

line - if a line to the label should be drawn

display - display the label anyway

isNullValue

public boolean isNullValue(double value)

getSeriesAndPointForScreenCoordinate

public SeriesSelection getSeriesAndPointForScreenCoordinate(Point screenPoint)

Given screen coordinates, returns the series and point indexes of a chart element. If there is no chart element (line, point, bar, etc) at those coordinates, null is returned.

Parameters:

screenPoint -

Returns:

the series and point indexes